ISSN:
0044-2313
Keywords:
bis(trimethylsilyl)aminosubstituted silanes
;
synthesis
;
lithium silylamides
;
reaction behaviour
;
cyclodisilazanes
;
crystal structures
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
The Reaction Behaviour of Lithiated Aminosilanes RR′Si(H)N(Li)SiMe3The bis(trimethylsilyl)aminosubstituted silances RR′Si(H)N(SiMe3)2 11-16 (R,R′ = Me, Me3SiNH, (Me3Si)2N) are obtained by the reaction of the lithium silylamides RR′Si(H)N(Li)SiMe3 1-10 (R,R′ = Me3SiNLi, Me, Me3SiNH, (M3Si)2N) with chlorotrimethylsilane in the polar solvent tetrahydrofurane (THF). In the reaction of the lithium silylamides [(Me3Si)2N]2(Me3SiNLi)SiH 10 with chlorotrimethylsilane in THF the rearranged product 1,1,3-tris[bis(trimethylsilyl)amino]-3-methyl-1,3-disila-butane [(Me3Si)2N]2Si(H)CH2SiMe2N(SiMe3)2 17 is formed. The reaction of the lithium silyamides RR′ Si(H)N(Li)SiMe3 1-3 (1: R = R′ = Me; 2: R = Me, R′ = Me3SiNH; 3: R = Me, R′ = Me3SiNLi) with chlorotrimethylsilane in the nonpolar solvent n-hexane gives the cyclodisilazanes [RR′ Si—NSiMe3]2 18-22 (R = Me, Me3SiNH, (Me3Si)2N; R′ = Me, Me3SiNH, (Me3Si)2N, N(SiMe3)Si · Me(NHSiMe3)2) and trimethylsilane. The lithium silylamides 4,5,6,9,10 (4: R = R′ = Me3SiNH; 5: R = Me3SiNH, R′ = Me3SiNLi; 6: R = R′ = Me3SiNLi; 9: R = (Me3Si)2N, R ′ = Me3SiNLi; 10: R = R′ = (Me3Si)2N) shows with chlorotrimethylsilane in n-hexane no reaction.The crystal structure of 17 and 21 are reported.
Notes:
Die bis(trimethylsilyl)aminosubstituierten Silane RR′Si(H)N(SiMe3)2 11-16 (R,R′ = Me, Me3SiNH, (Me3Si)2N) entstehen bei der Umsetzung der Lithiumsilylamide RR′Si(H)N(Li)SiMe3 1-10 (R,R′ = Me3SiNLi, Me, Me3SiNH, (M3Si)2N) mit Chlortrimethylsilan im polaren Lösungsmittel Tetrahydrofuran (THF). Das Lithiumsilylamid [(Me3Si)2N]2(Me3SiNLi) · SiH 10 reagiert mit Chlortrimethylsilan in THF unter Umlagerung zum 1,1,3-Tris[bis(trimethylsilyl)amino]-3-methyl-1,3-disila-butan [(Me3Si)2N]2Si(H)CH2SiMe2N · (SiMe3)2 17. Die Reaktion der Lithiumsilylamide RR′Si(H)N(Li)SiMe3 1-3 (1: R = R′ = Me; 2: R = Me, R′ = Me3SiNH; 3: R = Me, R′ = Me3SiNLi) mit Chlortrimethylsilan im unpolaren Lösungsmittel n-Hexan ergibt die Cyclodisilazane [RR′Si—NSiMe3]218-22 (R = Me, Me3SiNH, (Me3Si)2N; R′ = Me, Me3SiNH, (Me3Si)2N, N(SiMe3)SiMe(NHSiMe3)2) und Trimethylsilan. Die Lithiumsilylamide 4,5,6,9,10 (4: R=R′ = Me3SiNH; 5: R = Me3SiNH, R′ = Me3SiNLi; 6: R = R′ = Me3SiNLi; 9: R = (Me3Si)2N, R′ = Me3SiNLi; 10: R = R′ = (Me3Si)2N) zeigen mit Chlortrimethylsilan in n-Hexan keine Reaktion. Die Kristallstrukturen von 17 und 21 werden angegeben.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19926130125
